Alert archive / Georgia / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 430, NWS Atlanta, GA

June 30, 1999Cobb County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jun 30, 1999, 7:46 PM EDT for Cobb County, Georgia. It was in force for 34 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jun 30, 1999, 7:46 PM EDT (23:46 UTC)
Expired
Jun 30, 1999, 8:20 PM EDT
In force
34 min
Issued by
NWS Atlanta, GA
Area
Whole counties

County Cobb County, GA

What was reported inside it

TimeReportWhereRemark
Jun 30, 7:50 PM EDTThunderstorm WindMarietta, GAThe public reported trees were blown down.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.8 hours before the alert went out and 64 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 12:00Z on 1999-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 489 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 1999-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -29 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
489 J/kg
Mixed-layer CIN
-126 J/kg
Mixed-layer LCL
1070 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
-29 m²/s²
0-3 km storm-relative helicity
-31 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KATL 302345 RRA
SVRATL
GAC067-010020-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
746 PM EDT WED JUN 30 1999

THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  COBB COUNTY IN NORTHWESTERN GEORGIA

* UNTIL 820 PM EDT

* AT 746 PM... A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
  RADAR 6 MILES NORTHWEST OF VININGS...MOVING EAST AT 15 MPH.

* SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM ARE...
   VININGS                     AROUND 805 PM EDT...

DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN AND DEADLY LIGHTNING
ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. IF YOU SEE DAMAGE OR
LARGE HAIL...CALL THE NATIONAL WEATHER SERVICE AT 770-486-1133 AT
EXTENSION 2 0 4.

The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 29, 8:05 PM EDTSevere Thunderstorm WarningFFCBleckley, Houston, Pulaski35 min
Jun 29, 8:11 PM EDTTornado WarningFFCFayette34 min
Jun 29, 8:41 PM EDTSevere Thunderstorm WarningFFCCoweta, Fayette34 min
Jun 29, 8:53 PM EDTSevere Thunderstorm WarningFFCPulaski37 min
Jun 29, 9:25 PM EDTSevere Thunderstorm WarningFFCCoweta50 min
Jun 30, 1:42 PM EDTSevere Thunderstorm WarningFFCCarroll33 min
Jun 30, 1:48 PM EDTSevere Thunderstorm WarningFFCTroup32 min
Jun 30, 1:52 PM EDTSevere Thunderstorm WarningFFCCobb, Paulding48 min
Jun 30, 1:58 PM EDTSevere Thunderstorm WarningFFCHeard32 min
Jun 30, 2:15 PM EDTSevere Thunderstorm WarningFFCCoweta50 min
Jun 30, 2:22 PM EDTSevere Thunderstorm WarningFFCMeriwether33 min
Jun 30, 2:23 PM EDTSevere Thunderstorm WarningFFCBartow32 min
Jun 30, 2:27 PM EDTSevere Thunderstorm WarningFFCWebster33 min
Jun 30, 2:32 PM EDTSevere Thunderstorm WarningFFCHarris33 min
Jun 30, 2:37 PM EDTSevere Thunderstorm WarningFFCCobb33 min
Jun 30, 2:38 PM EDTSevere Thunderstorm WarningFFCLamar37 min
Jun 30, 2:43 PM EDTSevere Thunderstorm WarningFFCFulton32 min
Jun 30, 2:52 PM EDTSevere Thunderstorm WarningFFCFayette, Spalding33 min
Jun 30, 2:57 PM EDTSevere Thunderstorm WarningFFCGordon, Pickens33 min
Jun 30, 3:01 PM EDTSevere Thunderstorm WarningFFCCherokee, Fulton34 min
Jun 30, 3:02 PM EDTSevere Thunderstorm WarningFFCMonroe33 min
Jun 30, 3:12 PM EDTSevere Thunderstorm WarningFFCSumter48 min
Jun 30, 3:23 PM EDTSevere Thunderstorm WarningFFCClayton, Henry, Spalding47 min
Jun 30, 3:25 PM EDTSevere Thunderstorm WarningFFCGilmer35 min
Jun 30, 3:27 PM EDTSevere Thunderstorm WarningFFCDeKalb, Gwinnett48 min
Jun 30, 3:37 PM EDTSevere Thunderstorm WarningFFCButts, Newton48 min
Jun 30, 3:37 PM EDTSevere Thunderstorm WarningFFCRockdale48 min
Jun 30, 3:39 PM EDTSevere Thunderstorm WarningFFCDooly, Houston36 min
Jun 30, 3:41 PM EDTSevere Thunderstorm WarningFFCMarion, Schley, Taylor49 min
Jun 30, 3:53 PM EDTTornado WarningFFCDooly22 min
Jun 30, 3:57 PM EDTSevere Thunderstorm WarningFFCPulaski33 min
Jun 30, 4:10 PM EDTSevere Thunderstorm WarningFFCJasper35 min
Jun 30, 4:17 PM EDTSevere Thunderstorm WarningFFCMacon, Peach48 min
Jun 30, 4:20 PM EDTSevere Thunderstorm WarningFFCWalton50 min
Jun 30, 4:32 PM EDTSevere Thunderstorm WarningFFCMurray33 min
Jun 30, 4:37 PM EDTSevere Thunderstorm WarningFFCHouston, Pulaski33 min
Jun 30, 4:39 PM EDTSevere Thunderstorm WarningFFCBaldwin, Jones, Wilkinson51 min
Jun 30, 4:58 PM EDTSevere Thunderstorm WarningFFCTwiggs32 min
Jun 30, 5:02 PM EDTSevere Thunderstorm WarningFFCBleckley, Laurens33 min
Jun 30, 5:21 PM EDTSevere Thunderstorm WarningFFCGreene, Oglethorpe49 min
Jun 30, 5:36 PM EDTSevere Thunderstorm WarningFFCWashington34 min
Jun 30, 5:56 PM EDTSevere Thunderstorm WarningFFCWheeler34 min
Jun 30, 6:02 PM EDTSevere Thunderstorm WarningFFCBartow33 min
Jun 30, 6:24 PM EDTSevere Thunderstorm WarningFFCCherokee, Pickens36 min
Jun 30, 7:13 PM EDTSevere Thunderstorm WarningFFCCobb32 min

Nearby

Severe Thunderstorm Warnings in Georgia, 1999Every severe thunderstorm warning in 1999

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.